PLZ HELP How could chlorine enter the oceans. may be more than one answer

- volcanoes
- rivers
- density currents
- groundwater

volcanoes and rivers

Explanation:

the salt from the ocean come from fresh water rivers , and volcanic eruptions spew out water vapor and and carbon dioxide and other gasses like chlorine. the chlorine will then dissolve into the ocean and combine with sodium to get sodium chloride.

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